SELinux on Android

[Mr Dash Four]

Has this been done/implemented?

I've come across quite a few attempts - all in the not-so-recent past, 
but don't like any of them. The most "promising" effort I could find was 
by Yuichi Nakamura (ynakam at hitachisoft.jp), Hitachi Software Engineering 
Co., Ltd dating about 5 years ago! This effort is described at 
http://elinux.org/images/a/a3/ELC2008_nakamura.pdf.

Are there any better SELinux attempts/implementations done since then?